
set(SWIFT_RUNTIME_CXX_FLAGS)
set(SWIFT_RUNTIME_LINK_FLAGS)
set(SWIFT_RUNTIME_SWIFT_COMPILE_FLAGS)
set(SWIFT_RUNTIME_SWIFT_LINK_FLAGS)

if(SWIFT_RUNTIME_USE_SANITIZERS)
  # TODO: Refactor this
  if("Thread" IN_LIST SWIFT_RUNTIME_USE_SANITIZERS)
    list(APPEND SWIFT_RUNTIME_CXX_FLAGS "-fsanitize=thread")
    list(APPEND SWIFT_RUNTIME_LINK_FLAGS "-fsanitize=thread")
    list(APPEND SWIFT_RUNTIME_SWIFT_COMPILE_FLAGS "-sanitize=thread")
    list(APPEND SWIFT_RUNTIME_SWIFT_LINK_FLAGS "-fsanitize=thread")
  endif()
endif()

list(APPEND SWIFT_RUNTIME_SWIFT_COMPILE_FLAGS "-Xfrontend" "-verify-syntax-tree")

# Build the runtime with -Wall to catch, e.g., uninitialized variables
# warnings.
if(SWIFT_COMPILER_IS_MSVC_LIKE)
  list(APPEND SWIFT_RUNTIME_CXX_FLAGS "/W3")
else()
  list(APPEND SWIFT_RUNTIME_CXX_FLAGS "-Wall")
endif()

set(SWIFT_RUNTIME_CORE_CXX_FLAGS "${SWIFT_RUNTIME_CXX_FLAGS}")
set(SWIFT_RUNTIME_CORE_LINK_FLAGS "${SWIFT_RUNTIME_LINK_FLAGS}")

if(CMAKE_SYSTEM_NAME STREQUAL "CYGWIN")
  list(APPEND SWIFT_RUNTIME_CORE_CXX_FLAGS "-mcmodel=large")
endif()

# C++ code in the runtime and standard library should generally avoid
# introducing static constructors or destructors.
check_cxx_compiler_flag("-Werror -Wglobal-constructors" CXX_SUPPORTS_GLOBAL_CONSTRUCTORS_WARNING)
if(CXX_SUPPORTS_GLOBAL_CONSTRUCTORS_WARNING)
  list(APPEND SWIFT_RUNTIME_CORE_CXX_FLAGS "-Wglobal-constructors")
endif()

# C++ code in the runtime and standard library should generally avoid
# introducing static constructors or destructors.
check_cxx_compiler_flag("-Wexit-time-destructors" CXX_SUPPORTS_EXIT_TIME_DESTRUCTORS_WARNING)
if(CXX_SUPPORTS_EXIT_TIME_DESTRUCTORS_WARNING)
  list(APPEND SWIFT_RUNTIME_CORE_CXX_FLAGS "-Wexit-time-destructors")
endif()

# We don't want runtime C++ code to export symbols we didn't explicitly
# choose to.
check_cxx_compiler_flag("-fvisibility=hidden" CXX_SUPPORTS_DEFAULT_HIDDEN_VISIBILITY)
if(CXX_SUPPORTS_DEFAULT_HIDDEN_VISIBILITY)
  list(APPEND SWIFT_RUNTIME_CORE_CXX_FLAGS "-fvisibility=hidden")
endif()

add_subdirectory(SwiftShims)

if(SWIFT_BUILD_STDLIB)
  # These must be kept in dependency order so that any referenced targets
  # exist at the time we look for them in add_swift_*.
  add_subdirectory(runtime)
  add_subdirectory(stubs)
  add_subdirectory(core)
  add_subdirectory(SwiftOnoneSupport)

  if(SWIFT_ENABLE_EXPERIMENTAL_DIFFERENTIABLE_PROGRAMMING)
    add_subdirectory(Differentiation)
  endif()
endif()

if(SWIFT_BUILD_STDLIB OR SWIFT_BUILD_REMOTE_MIRROR)
  add_subdirectory(Reflection)
  add_subdirectory(SwiftRemoteMirror)
endif()

if(SWIFT_BUILD_SDK_OVERLAY)
  add_subdirectory(Platform)
endif()

if(SWIFT_BUILD_SDK_OVERLAY)
  list_intersect("${SWIFT_APPLE_PLATFORMS}" "${SWIFT_SDKS}" building_darwin_sdks)
  if(building_darwin_sdks)
    add_subdirectory(Darwin)
  endif()

  if(WINDOWS IN_LIST SWIFT_SDKS)
    add_subdirectory(Windows)
  endif()
endif()

